Shock absorber, damping system and vehicle

Abstract

The present disclosure provides a damper, a damping system and a vehicle. The damper comprises an outer cylinder including a cylinder body and a cylinder bottom connected to the bottom of the cylinder body; and a core body arranged in the cylinder body and having a space with the cylinder bottom, the core body cooperates with the cylinder body and forms a closed first cavity with the outer cylinder, the inside of the first cavity is filled with gas and damping liquid, the core body comprises an elastic body, the elastic body is provided with a second cavity arranged around the circumference of the damper, the second cavity is provided with a partition wall connected to the elastic body, in the radial cross section of the damper, the second cavity is divided into a communication end and a blind end by the partition wall, and the communication end communicates with the first cavity. The damping system comprises: the aforementioned damper; a vibration detection device configured to obtain a vibration load of a vibration isolation object of the vibration isolation system; and a control device connected to the vibration detection device and the coil signal, configured to output a control signal for adjusting the current intensity of the coil according to the vibration load.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of vibration and isolation technology, and in particular to a damper, a damping system and a vehicle. BACKGROUND

[0002] With the development of engineering machinery technology, the vibration isolation and ride comfort of engineering machinery products have become important indicators of product competitiveness and brand influence. As the main source of vibration of engineering machinery, the engine will produce complex vibrations of different vibration sources and modes when providing power for engineering machinery due to the impact and reciprocating motion caused by fuel combustion. These coupled vibrations will result in engine vibrations with the characteristics of wide frequency, multiple dominant frequencies and multiple vibration sources, which requires the damping system of engineering machinery products to adjust the dynamic stiffness value and damping value in real time according to the characteristics of the vibration to achieve the best isolation rate.

[0003] Engineering machinery generally uses dampers for vibration isolation. The role of the damper is to block and weaken the transmission of vibration energy from the vibration source to the vehicle frame and the vibration of the vehicle frame to the cab, to accelerate the attenuation of vibration, and to improve the vibration fatigue of parts and the comfort of operators. However, the damping effect of the damper used in the current vibration isolation system of the cab of the engineering machinery is relatively limited. In particular, low-frequency vibrations caused by instantaneous impact during work cannot be effectively isolated. Although the stiffness of the damper is designed to be small, it can still cause low-frequency shaking problems that are more sensitive to the human body. SUMMARY

[0004] The purpose of the present disclosure is to provide a damper, a damping system and a vehicle to improve the damping effect.

[0005] The first aspect of the present disclosure provides a damper, comprising:

[0006] an outer cylinder comprising a cylinder body and a cylinder bottom connected to the bottom of the cylinder body in a closed manner; and

[0007] a core body arranged in the cylinder body and having a spacing with the cylinder bottom, the core body cooperating with the cylinder body and forming a closed first cavity with the outer cylinder, the first cavity being filled with gas and damping liquid inside, the core body comprising an elastic body, the elastic body being provided with a second cavity arranged around the circumference of the damper, the second cavity being provided with a partition wall connected to the elastic body, in the radial cross section of the damper, the second cavity is divided by the partition wall to form a communication end and a blind end, and the communication end is in communication with the first cavity.

[0008] According to some embodiments of the present disclosure, on a radial cross-section of the damper, the partition wall has a first end connected to the elastic body and a second end being a free end, and the cross-sectional size of the partition wall gradually decreases from the first end to the second end.

[0009] According to some embodiments of the present disclosure, the cross-sectional size of the partition wall gradually decreases from the first end to the second end.

[0010] According to some embodiments of the present disclosure, the partition wall is curved from the first end to the second end and forms a curved fluid passage inside the second cavity.

[0011] According to some embodiments of the present disclosure, the partition wall extends along a spiral line from the first end to the second end and forms a spiral fluid passage inside the second cavity.

[0012] According to some embodiments of the present disclosure, on any radial cross-section of the damper, the partition wall is curved from the first end to the second end and forms a curved fluid passage inside the second cavity.

[0013] According to some embodiments of the present disclosure, the partition wall is integrally formed on the elastic body.

[0014] According to some embodiments of the present disclosure, the core further comprises:

[0015] a support shaft penetrating through the elastic body along the axial direction of the damper and fixedly connected with the elastic body; and

[0016] a damping plate located at the bottom end of the support shaft and extending into the interior of the first cavity, the damping plate protruding outward in the radial direction of the damper relative to the support shaft and forming a damping passage in the interior of the first cavity, one of the support shaft and the outer cylinder being used to connect with a base of an isolation system, and the other being used to connect with an isolated object of the isolation system.

[0017] According to some embodiments of the present disclosure, the damping passage is formed below the liquid surface of the damping liquid.

[0018] According to some embodiments of the present disclosure, the damping plate is provided with a damping hole, the damping hole being a through hole extending from the top end to the bottom end of the damping plate, and the damping plate being in sliding fit with the inner wall of the outer cylinder in the axial direction of the damper.

[0019] According to some embodiments of the present disclosure, the damping hole comprises a first hole section and a second hole section formed in sequence from the top end to the bottom end of the damping plate, and the flow area of the first hole section is greater than that of the second hole section.

[0020] According to some embodiments of the present disclosure, the damping holes are obliquely arranged through the damping plate.

[0021] According to some embodiments of the present disclosure, the damping holes are evenly arranged along the circumference of the damping plate.

[0022] According to some embodiments of the present disclosure, the top end of the support shaft is provided with at least one connecting structure, and the support shaft is configured to be connected to the vibration isolation object through the at least one connecting structure.

[0023] According to some embodiments of the present disclosure, the damper further comprises a spring, the top end of the spring is connected to the bottom end of the support shaft, and the bottom end of the spring is connected to the bottom surface of the first cavity.

[0024] According to some embodiments of the present disclosure, the stiffness of the spring is variable.

[0025] According to some embodiments of the present disclosure, the diameter of the spring decreases first and then increases from the axial top end of the spring to the axial bottom end of the spring.

[0026] According to some embodiments of the present disclosure, the inside of the core is provided with a third cavity, and the inside of the third cavity is filled with damping particles.

[0027] According to some embodiments of the present disclosure, the damper further comprises a coil, the coil is arranged on the outer side of the outer cylinder, the damping liquid is a magneto-rheological liquid, and the damper is configured to adjust the viscosity of the magneto-rheological liquid according to the current intensity of the coil.

[0028] The second aspect of the present disclosure provides a damping system, comprising:

[0029] The damper of the first aspect of the present disclosure;

[0030] A vibration detection device configured to obtain the vibration load of the vibration isolation object of the vibration isolation system; and

[0031] A control device connected to the vibration detection device and the coil signal, and configured to output a control signal for adjusting the current intensity of the coil according to the vibration load.

[0032] The third aspect of the present disclosure provides a vehicle comprising the damper of the first aspect of the present disclosure or the damping system of the second aspect of the present disclosure.

[0033] The second cavity can be regarded as a space in the cochlea duct of the cochlea, and the partition wall can be regarded as the basilar membrane of the cochlea, and the second cavity and the partition wall form a bionic damping structure. When the vibration object is subjected to a vibration impact, the elastomer deforms, the volume of the first cavity changes, and the gas flows in the second cavity. By reasonably setting the shape and size of the partition wall, the natural frequency of the partition wall can be matched with the frequency of the vibration wave, so that the gas flowing in the second cavity can cause the resonance of the partition wall, thereby sufficiently attenuating the vibration energy and playing a good damping effect.

[0034] The damping system and the vehicle provided by the embodiments of the present disclosure have the advantages of the damper provided by the embodiments of the present disclosure.

[0035] Other features of the present disclosure and its advantages will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are included to provide a further understanding of the present disclosure and constitute a part of this application, illustrate certain illustrative embodiments of the present disclosure and are used to explain the present disclosure, but do not limit the present disclosure. In the drawings:

[0037] Figure 1 A structural schematic diagram of a damper of some embodiments of the present disclosure.

[0038] Figure 2 A structural schematic diagram of a damper of some embodiments of the present disclosure. Figure 1 A structural schematic diagram of a damper of some embodiments of the present disclosure.

[0039] Figure 3 A control principle schematic diagram of a damping system of some embodiments of the present disclosure.

[0040] Figure 4 The state of the magnetorheological liquid in the damper of some embodiments of the present disclosure when the coil is not powered is shown.

[0041] Figure 5 The state of the magnetorheological liquid in the damper of some embodiments of the present disclosure when the coil is powered is shown.

[0042] Figures 1 to 4 In the drawings, the reference numerals represent the following:

[0043] 1, outer cylinder; 11, cylinder body; 12, cylinder bottom; 2, core; 21, elastomer; 22, support part; 221, support shaft; 222, damping plate; 3, coil; 4, spring; 5, control device; 6, vibration detection device;

[0044] C1, first cavity; C2, second cavity; G, gas; H1, damping hole; H2, connecting structure; L, damping liquid; M1, liquid phase; M2, magnetic particle; P, damping particle; R, damping channel; S, damper; W, partition wall. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present disclosure.

[0046] Unless specifically stated, the relative arrangement of the components and steps, numerical expressions, and numerical values set forth in the various embodiments described herein are not meant to limit the scope of the present disclosure. Also, it is to be understood that the use of relational terms such as, but not limited to, first, second, top, bottom, upper, lower, front, rear, left, right, horizontal, vertical, above, below, up, down, under, over, about, and / or the like are used for clarity in only describing the various embodiments and are not to be construed as limiting the scope of the present disclosure. Further, any reference to claim, element, figure, article, artwork, name or acronym (e.g., IEEE, IEEE Std, IEEE Std 802.11, etc.) is not intended to be limiting of the scope of the present disclosure unless specifically so stated.

[0047] In the description of the present disclosure, it should be understood that the use of the words "first", "second", and the like words of similar meaning are used to distinguish one part from another, and do not have special meanings unless otherwise stated. Therefore, it cannot be understood as a limitation on the scope of protection of the present disclosure.

[0048] In the description of the present disclosure, it should be understood that the orientation words such as "front, rear, upper, lower, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. In the absence of the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a particular orientation or be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the scope of protection of the present disclosure; the orientation words "inner, outer" refer to the inner and outer relative to the contour of each component.

[0049] According to the related art known to the inventors, the damper has the following problems to be improved:

[0050] The dynamic stiffness and damping of the damper are difficult to adjust, and the damper can only exhibit good vibration isolation performance in a specific frequency range, which is difficult to adapt to the complex working conditions during the operation of the engineering vehicle, especially during the operation, and is difficult to maximize the comfort of the driver.

[0051] The damper cannot effectively isolate low-frequency vibrations, and cannot fundamentally solve the problem of low-frequency shaking of the isolation object during the operation of the engineering machinery.

[0052] The dynamic characteristics of the silicone oil damper are greatly affected by temperature, and the stiffness and damping decrease with increasing temperature. When the silicone oil damper is operated for a long time under heavy load and impact conditions, the vibration isolation effect will decrease significantly.

[0053] In the process of implementing the present disclosure, the inventors found that the cochlea of the human ear has a basilar membrane, the shape and size of different positions of the basilar membrane are different, and the natural frequency is also different. Sound waves propagate in the cochlea in the form of a traveling wave, and the vibration of the basilar membrane is caused during the propagation of the sound waves. Different positions of the basilar membrane can sense sound waves of different frequencies, so that a person can perceive sounds of different frequencies. Therefore, based on the above principle, a bionic damping structure can be provided in the damper to enable the damper to isolate vibrations of different frequencies.

[0054] Considering the above damping principle, with reference to Figure 1 and Figure 2 some embodiments of the present disclosure provide a damper S, comprising an outer cylinder 1 and a core body 2.

[0055] The outer cylinder 1 is used to connect with one of the base or the isolation object of the vibration isolation system, and the core body 2 is used to connect with the other one of the base or the isolation object of the vibration isolation system. When the damper S is used for damping of a vehicle, the outer cylinder 1 can be connected with the vehicle frame as the base, and the core body 2 can be connected with the cab or other components or structures that need to be damped as the isolation object.

[0056] The outer cylinder 1 comprises a cylinder body 11 and a cylinder bottom 12 which is connected to the bottom of the cylinder body 11 in a closed manner.

[0057] The core body 2 is arranged in the cylinder body 11 and has a spacing with the cylinder bottom 12. The core body 2 cooperates with the cylinder body 11 and forms a closed first cavity C1 with the outer cylinder 1, and the inside of the first cavity C1 is filled with gas G and damping liquid L. The core body 2 comprises an elastic body 21, and the elastic body 21 is provided with a second cavity C2 arranged around the circumference of the damper S. The second cavity C2 is provided with a partition wall W connected to the elastic body 21. In the radial cross section of the damper S, the second cavity C2 is divided by the partition wall W to form a communication end and a blind end, and the communication end communicates with the first cavity C1.

[0058] As shown in the embodiment of Figure 1 and Figure 2 , the outer cylinder 1 can be an open-top, closed-bottom cylindrical structure. In addition, the top of the outer cylinder 1 can also be bent to form a mounting plane, so as to be connected with the base or the vibration isolation object.

[0059] The elastic body 21 can be made of rubber or other elastic materials. In the elastic body 21, the number of the second cavities C2 can be one or more. As shown in the embodiment of Figure 2 , the number of the second cavities C2 is one, and the second cavity C2 penetrates the elastic body 21 around the circumference of the damper S. In some embodiments not shown, a plurality of second cavities C2 can also be arranged around the circumference of the damper S, and preferably, the plurality of second cavities C2 can be uniformly distributed around the circumference. The material of the partition wall W can be the same as or different from that of the elastic body 21, and the partition wall W and the elastic body 21 can be integrally formed or separately formed and then connected.

[0060] In the damper provided by the embodiment of the present disclosure, the second cavity C2 can be regarded as the space in the cochlea duct of the cochlea, and the partition wall W can be regarded as the basilar membrane of the cochlea. The second cavity C2 and the partition wall W constitute a bionic damping structure. When the vibration impact is applied to the vibration isolation object, the elastic body 21 deforms, the volume of the first cavity C1 changes, and the gas G flows in the second cavity C2. By reasonably setting the shape and size of the partition wall W, the natural frequency of the partition wall W can be adapted to the frequency of the vibration wave, so that the gas G flowing in the second cavity C2 can cause the resonance of the partition wall W, thereby sufficiently attenuating the vibration energy and playing a good damping effect.

[0061] In some embodiments, in the radial cross section of the damper S, the partition wall W has a first end and a second end, the first end is connected to the elastic body 21, and the second end is a free end. From the first end to the second end, the cross-sectional size of the partition wall W is not uniform.

[0062] The non-uniform cross-sectional size of the partition wall W makes the natural frequency of the partition wall W different at different positions. By reasonably setting the cross-sectional size of the partition wall W, vibration waves in a wide frequency range can all cause resonance at different positions of the partition wall W, thereby achieving wide-frequency damping.

[0063] The bottom basilar membrane of the cochlea is thicker and used for sensing high-frequency sound waves, and the top basilar membrane of the cochlea is thinner and used for sensing low-frequency sound waves. In order to enable the damper to effectively isolate a series of vibrations from high frequency to low frequency, especially low frequency, in some embodiments, the cross-sectional size of the partition wall W gradually decreases from the first end to the second end.

[0064] In some embodiments, as shown in Figure 1As shown, from the first end to the second end, the partition wall W is curved and forms a curved fluid passage inside the second cavity C2.

[0065] The curved fluid passage formed by the curved partition wall W inside the second cavity can increase the damping and improve the damping effect of the damper S.

[0066] In order to make the damping structure composed of the second cavity C2 and the partition wall W more similar to the real structure of the cochlea, thereby obtaining a better bionic effect, further, in some embodiments, as shown in Figure 1 As shown, from the first end to the second end, the partition wall W extends along a spiral line and forms a spiral fluid passage inside the second cavity C2.

[0067] Further, in some embodiments, as shown in Figure 1 and Figure 2 As shown, from the first end to the second end, the partition wall W is curved and forms a curved fluid passage inside the second cavity C2.

[0068] In the damper of the above-mentioned embodiments, the second cavity C2 penetrating the elastomer 21 around the circumference of the damper S is formed, which is conducive to uniformly distributing the damping along the circumference of the damper S.

[0069] As shown in the embodiment shown in Figure 1 As shown, from the first end to the second end, the partition wall W extends along a spiral line and forms a spiral fluid passage inside the second cavity C2, and the cross-sectional size of the partition wall W gradually decreases, and the second cavity C2 and the partition wall W form a bionic damping structure similar in shape to the cochlea. In the process of the vibration wave propagating from the communication end to the blind end of the second cavity C2, vibration waves of different frequencies can resonate at different positions of the partition wall W, thereby greatly attenuating the vibration energy. As the cross-sectional size of the partition wall W gradually decreases, the natural frequency of the partition wall W gradually decreases, so that the bionic damping structure can effectively isolate low-frequency vibrations, and the damper S can realize wide-frequency damping.

[0070] In some embodiments, as shown in Figure 1 The partition wall W is integrally formed on the elastomer 21.

[0071] For example, the elastomer 21 can be made of rubber, and the partition wall W can be vulcanized together with the elastomer 21.

[0072] For the integrally formed elastomer 21 and partition wall W, the shape and size of the partition wall W can be directly met by making the shape and size of the second cavity C2 meet certain conditions. For example, by designing the second cavity C2 with uneven through-flow area, the partition wall W with uneven cross-sectional size can be formed.

[0073] In some embodiments, as shown in Figure 1 The core 2 further includes a support shaft 221 and a damping plate 222. The support shaft 221 penetrates the elastic body 21 along the axial direction of the damper S and is fixedly connected with the elastic body 21. The damping plate 222 is located at the bottom end of the support shaft 221 and extends into the first cavity C1. The damping plate 222 protrudes outward in the radial direction of the damper S relative to the support shaft 221 and forms a damping passage in the first cavity C1. One of the support shaft 221 and the outer cylinder 1 is used to be connected with the base of the vibration isolation system, and the other is used to be connected with the vibration isolation object of the vibration isolation system.

[0074] The damping passage can be directly provided on the damping plate 222 or formed between the circumferential surface on the radial outer side of the damping plate 222 and the inner wall of the cylinder body 11.

[0075] In order to fully exert the damping effect of the damping passage on the damping liquid L during the up-and-down movement of the support shaft 221, in some embodiments, the damping passage is formed below the liquid level of the damping liquid L.

[0076] As one of the specific forms in which the damping passage is directly provided on the damping plate 222, in some embodiments, as shown in Figure 1 The damping plate 222 is provided with a damping hole H1. The damping hole H1 is a through hole extending from the top end to the bottom end of the damping plate 222, and the damping plate 222 is in sliding fit with the inner wall of the outer cylinder 1 in the axial direction of the damper S. The damping hole H1 serves as the damping passage.

[0077] In some embodiments, as shown in Figure 1 The damping hole H1 includes a first hole section H11 and a second hole section H12 formed in sequence from the top end to the bottom end of the damping plate 222, and the flow area of the first hole section H11 is greater than that of the second hole section H12.

[0078] In the embodiment shown in Figure 1 The damping hole H1 can be a stepped hole, and the diameter of the first hole section H11 is greater than that of the second hole section H12.

[0079] In some embodiments not shown in the drawings, the flow area of the damping hole H1 can also continuously change from the top end to the bottom end of the damping plate 222, for example, the flow area of the damping hole H1 can continuously decrease from the top end to the bottom end of the damping plate 222.

[0080] By providing the damping hole H1 with a large flow area at the top end and a small flow area at the bottom end, when the damping liquid L flows from the first hole section H11 to the second hole section H12 of the damping hole H1, the flow area decreases, the flow rate decreases, and the pressure increases, thereby increasing the damping, which is conducive to more fully absorbing the impact vibration energy by the damper and improving the smoothness of the vibration isolation object.

[0081] In some embodiments, as shown inFigure 1 As shown, the damping holes H1 are obliquely through the damping plate 222.

[0082] By setting the damping holes H1 to be oblique, the flow length of the damping holes H1 can be increased, further increasing the damping, thereby improving the damping effect.

[0083] In order to make the damping uniformly distributed along the circumference of the damper S, in some embodiments, a plurality of damping holes H1 are uniformly distributed along the circumference of the damping plate 222.

[0084] In some embodiments, as shown in the embodiment shown in Figure 1 The top end of the support shaft 221 is provided with at least one connecting structure H2, and the support shaft 221 is configured to be connected with the vibration isolation object of the vibration isolation system through the at least one connecting structure H2.

[0085] The connection mode of the support shaft 221 with the vibration isolation object, for example, in the embodiment shown in Figure 1 The connecting structure H2 can be a threaded hole, and the support shaft 221 is connected with the vibration isolation object through a threaded connection. When the top end of the support shaft 221 is provided with a plurality of connecting structures H2, the support shaft 221 can be fixed more firmly with the vibration isolation object.

[0086] In some embodiments, as shown in the embodiment shown in Figure 1 The damper S further comprises a spring 4. The top end of the spring 4 is connected with the bottom end of the support shaft 221, and the bottom end of the spring 4 is connected with the bottom surface of the first cavity C1.

[0087] Preferably, the spring 4 can be coaxially arranged with the support shaft 221.

[0088] In order to adapt to the damping requirements of the damper for different vibration loads and improve the damping effect of the damper for different vibration loads, in some embodiments, the stiffness of the spring 4 is variable.

[0089] In order to realize variable stiffness, the spring 4 can adopt a variable-diameter or variable-pitch spring, such as a conical spiral spring.

[0090] In some embodiments, as shown in the embodiment shown in Figure 1 From the axial top end of the spring 4 to the axial bottom end of the spring 4, the diameter of the spring 4 first decreases and then increases.

[0091] In some embodiments, as shown in the embodiment shown in Figure 1 The inside of the core 2 is provided with a third cavity C3, and the inside of the third cavity C3 is filled with damping particles P.

[0092] As shown in the embodiment shown in Figure 4 The third cavity C3 can be arranged inside the support shaft 221. The damping particles P can be metal particles or high-temperature-resistant non-metal particles.

[0093] The third cavity C3 and the damping particles P filled therein can jointly constitute a particle damper. Through the collision and friction between different damping particles P, the collision and friction between the damping particles P and the cavity wall of the third cavity C3, and the gas damping suffered by the damping particles P in the third cavity C3, the vibration energy can be fully dissipated to achieve the purpose of vibration reduction, and the range of vibration reduction frequency of the damper S can be widened. Therefore, the particle damper composed of the third cavity C3 and the damping particles P is beneficial to further enhance the vibration reduction effect of the damper S.

[0094] In some embodiments, the damper S further comprises a coil 3. The coil 3 is arranged on the circumferential outer side of the outer cylinder 1, the damping liquid L is a magneto-rheological liquid, and the damper S is configured to adjust the viscosity of the magneto-rheological liquid according to the current intensity of the coil 3.

[0095] When the coil 3 is powered on, the damper S can act as an active damper; when the coil 3 is powered off, the damper S can act as a passive damper. According to different use requirements, the coil 3 can be arranged to be detachable to facilitate debugging, maintenance and replacement.

[0096] By changing the current intensity of the coil 3, a magnetic field of different intensity can be generated. As shown in Figure 5 and Figures 1 to 3 The magneto-rheological liquid as the damping liquid L includes a liquid phase M1 and magnetic particles M2 dispersed in the liquid phase M1. When the magnetic field intensity changes, the dispersion state of the magnetic particles M2 in the liquid phase M1 also changes, thereby causing the viscosity of the magneto-rheological liquid to change. Therefore, by changing the current intensity of the coil 3, the viscosity of the magneto-rheological liquid can be actively adjusted, and then the dynamic stiffness and damping parameters of the damper S can be actively adjusted, so that the damper S can exhibit good vibration isolation performance in a wide frequency range, which is beneficial to make the equipment installed with the damper S further adapt to the requirements of complex working conditions.

[0097] Moreover, even if the damper works continuously for a long time under the working conditions of large load and large impact, the damping liquid L can have sufficient viscosity by adjusting the current of the coil 3, thereby alleviating the problem of reduced damping effect of the damper.

[0098] Referring to Figures 1 to 4 , some embodiments of the present disclosure also provide a damping system comprising the damper S provided by the embodiments of the present disclosure, a vibration detection device 6 and a control device 5.

[0099] The damper S comprises a coil 3. The coil 3 is arranged on the circumferential outer side of the outer cylinder 1, the damping liquid L is a magneto-rheological liquid, and the damper S is configured to adjust the viscosity of the magneto-rheological liquid according to the current intensity of the coil 3.

[0100] The vibration detection device 6 is configured to acquire the vibration load of the vibration isolation object O of the vibration isolation system. The control device 5 is in signal connection with the vibration detection device 6 and the coil 3, and is configured to output a control signal for adjusting the current intensity of the coil 3 according to the vibration load.

[0101] The vibration isolation system provided by the embodiments of the present disclosure can acquire the vibration condition of the vibration isolation object in real time according to the detection result of the vibration detection device, and can timely change the dynamic characteristics of the vibration absorber by adjusting the current intensity of the coil, so that the vibration isolation performance of the vibration absorber can adapt to complex and changeable use conditions.

[0102] In some embodiments, the control device described above can be implemented as a general-purpose processor, a programmable logic controller (PLC), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof, for performing the functions described in the present disclosure.

[0103] The working principle of the vibration absorber and the vibration isolation system of some embodiments of the present disclosure will be further described below. ​ The working principle of the vibration absorber and the vibration isolation system of some embodiments of the present disclosure will be further described below.

[0104] The vibration absorber S includes an outer cylinder 1, a core 2, a coil 3 and a spring 4.

[0105] The outer cylinder 1 includes a cylinder body 11 and a cylinder bottom 12 sealingly connected to the bottom of the cylinder body 11.

[0106] The core 2 is arranged in the cylinder body 11 and has a spacing from the cylinder bottom 12. The core 2 cooperates with the cylinder body 11 to form a sealed first cavity C1 with the outer cylinder 1, and the first cavity C1 is filled with gas G and damping liquid L. The core 2 includes an elastic body 21 made of rubber. The elastic body 21 is provided with a second cavity C2 arranged around the circumference of the vibration absorber S. The second cavity C2 is provided with a partition wall W connected to the elastic body 21. In the radial cross section of the vibration absorber S, the second cavity C2 is divided by the partition wall W to form a communication end and a blind end, and the communication end is in communication with the first cavity C1.

[0107] The partition wall W has a first end connected to the elastic body 21 and a second end which is a free end in any radial section of the damper S. The cross-sectional size of the partition wall W gradually decreases from the first end to the second end, and the partition wall W extends along a spiral line and forms a spiral fluid passage inside the second cavity C2. The partition wall W is integrally formed on the elastic body 21.

[0108] The core 2 further includes a support shaft 221 and a damping plate 222.

[0109] The support shaft 221 penetrates the elastic body 21 in the axial direction of the damper S and is fixedly connected to the elastic body 21. The inside of the support shaft 221 is provided with a third cavity C3, and the third cavity C3 is filled with damping particles P.

[0110] The damping plate 222 is located at the bottom end of the support shaft 221 and extends into the first cavity C1. The damping plate 222 protrudes outward in the radial direction of the damper S relative to the support shaft 221 and is provided with a damping hole H1. The damping hole H1 is a through hole extending from the top end to the bottom end of the damping plate 222, and the damping plate 222 is in sliding fit with the inner wall of the outer cylinder 1 in the axial direction of the damper S. The damping hole H1 includes a first hole section H11 and a second hole section H12 formed in sequence from the top end to the bottom end of the damping plate 222, and the flow area of the first hole section H11 is greater than that of the second hole section H12. The damping hole H1 obliquely penetrates the damping plate 222. A plurality of damping holes H1 are uniformly distributed in the circumferential direction of the damping plate 222.

[0111] The coil 3 is arranged on the outer side of the outer cylinder 1 in the circumferential direction, and the damping liquid L is a magneto-rheological liquid. The damper S is configured to adjust the viscosity of the magneto-rheological liquid according to the current intensity of the coil 3.

[0112] The top end of the spring 4 is connected to the bottom end of the support shaft 221, and the bottom end of the spring 4 is connected to the bottom surface of the first cavity C1. From the axial top end of the spring 4 to the axial bottom end of the spring 4, the diameter of the spring 4 first decreases and then increases.

[0113] The damping system includes the above-mentioned damper S, a control device 5 and a vibration detection device 6. The vibration detection device 6 is configured to obtain the vibration load of the isolation object O of the isolation system. The control device 5 is in signal connection with the vibration detection device 6 and the coil 3, and is configured to output a control signal for adjusting the current intensity of the coil 3 according to the vibration load.

[0114] The outer cylinder 1 of the damper S is fixedly connected to the base, and the support shaft 221 is fixedly connected to the isolation object. At this time, the damper S is subjected to a preload to produce a pre-compression deformation, and the elastic body 21 and the spring 4 reach a force balance at a certain position.

[0115] When the base is subjected to a low-frequency vibration impact, the support shaft 221 moves up and down.

[0116] The elastomer 21 generates shear deformation, the volume of the first cavity C1 changes, the gas G flows in the second cavity C2, and the gas G forms an air spring in the space formed by the outer cylinder 1, the core 2 and the damping liquid L.

[0117] When the support shaft 221 moves up and down, the support shaft 221 drives the spring to expand and contract, the stiffness of the spring 4 changes with the change of the compression amount, so as to adapt to the vibration damping requirements of different vibration loads; the support shaft 221 drives the damping hole H1 to move up and down, so that the magnetorheological liquid as the damping liquid L flows back and forth through the damping hole H1; and in the particle damper formed by the third cavity C3 and the damping particles P, the damping particles P collide and rub constantly, so as to fully attenuate the vibration energy.

[0118] On this basis, if the coil 3 is electrified, the shock absorber S becomes an active shock absorber, and the viscosity of the magnetorheological liquid changes with the change of the magnetic field strength generated by the electrification of the coil 3. The shock absorber can adaptively and in real time adjust the dynamic stiffness value and the damping value according to the load characteristics of the vibration load obtained by the vibration detection device 6, and the adjustment range is wide and the response is fast.

[0119] The shock absorber S described above combines different damping materials or damping structures such as air springs, spiral springs, rubber and magnetorheological liquids together, can play their respective advantages, and presents lower dynamic stiffness, lower natural frequency and larger compression amount. Therefore, the shock absorber S described above can widen the vibration damping frequency range, improve the vibration isolation rate, and more effectively isolate low-frequency vibrations.

[0120] Some embodiments of the present disclosure also provide a vehicle comprising the shock absorber provided by the embodiments of the present disclosure, or comprising the shock absorption system provided by the embodiments of the present disclosure.

[0121] The vehicle provided by the embodiments of the present disclosure can be an engineering vehicle, and can also be a commercial vehicle or a passenger vehicle, etc. Due to the use of the foregoing shock absorber or shock absorption system, the vehicle provided by the embodiments of the present disclosure has the advantages of the foregoing shock absorber or shock absorption system.

[0122] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure but not to limit them; although the present disclosure has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present disclosure can be modified or some technical features can be replaced by equivalent replacements, which should be covered in the technical solution range of the present disclosure.

Claims

1. A damper characterized by, Comprise: An outer cylinder (1) comprising a cylinder body (11) and a cylinder bottom (12) which is connected to the bottom of the cylinder body (11) in a closed manner; And A core (2) which is arranged in the cylinder body (11) and has a spacing with the cylinder bottom (12), the core (2) cooperates with the cylinder body (11) and forms a closed first cavity (C1) with the outer cylinder (1), the inside of the first cavity (C1) is filled with gas (G) and damping liquid (L), the core (2) comprises an elastic body (21), the elastic body (21) is provided with a second cavity (C2) which is arranged around the damper (S) in the circumferential direction, the second cavity (C2) is provided with a partition wall (W) which is connected to the elastic body (21), in the radial cross section of the damper (S), the second cavity (C2) is divided into a communication end and a blind end by the partition wall (W), the communication end communicates with the first cavity (C1), the material of the partition wall (W) is the same as that of the elastic body (21); The core (2) further comprises a support shaft (221) and a damping plate (222), the support shaft (221) penetrates the elastic body (21) along the axial direction of the damper (S) and is fixedly connected with the elastic body (21), the damping plate (222) is located at the bottom end of the support shaft (221) and extends to the inside of the first cavity (C1), the damping plate (222) protrudes outward relative to the support shaft (221) along the radial direction of the damper (S) and forms a damping channel in the inside of the first cavity (C1), one of the support shaft (221) and the outer cylinder (1) is used for connecting with the base of the vibration isolation system, and the other is used for connecting with the vibration isolation object of the vibration isolation system, the damping plate (222) is provided with a damping hole (H1), the damping hole (H1) is a through hole which extends from the top end to the bottom end of the damping plate (222), the damping plate (222) is in sliding fit with the inner wall of the outer cylinder (1) along the axial direction of the damper (S), the damping hole (H1) comprises a first hole section (H11) and a second hole section (H12) which are sequentially formed from the top end to the bottom end of the damping plate (222), the flow area of the first hole section (H11) is greater than that of the second hole section (H12), and the damping hole (H1) serves as the damping channel.

2. The damper of claim 1, wherein In the radial cross section of the damper (S), the partition wall (W) has a first end and a second end, the first end is connected to the elastic body (21), and the second end is a free end, from the first end to the second end, the cross-sectional size of the partition wall (W) is not uniform.

3. The damper of claim 2, wherein From the first end to the second end, the cross-sectional size of the partition wall (W) gradually decreases.

4. The damper of claim 2, wherein From the first end to the second end, the partition wall (W) is curved and forms a curved fluid channel in the inside of the second cavity (C2).

5. The damper of claim 4, wherein From the first end to the second end, the partition wall (W) extends along a spiral line and forms a spiral fluid channel in the inside of the second cavity (C2).

6. The damper of claim 4, wherein In any radial section of the damper (S), the partition wall (W) is curved and forms a curved fluid passage inside the second cavity (C2) from the first end to the second end.

7. The damper of claim 1, wherein The partition wall (W) is integrally formed on the elastic body (21).

8. The damper of claim 1, wherein The damping passage is formed below the liquid surface of the damping liquid (L).

9. The damper of claim 1, wherein The damping hole (H1) obliquely penetrates the damping plate (222).

10. The damper of claim 1, wherein A plurality of damping holes (H1) are uniformly distributed along the circumference of the damping plate (222).

11. The damper of claim 1, wherein The top end of the support shaft (221) is provided with at least one connecting structure (H2), and the support shaft (221) is configured to be connected with a vibration isolation object of a vibration isolation system through the at least one connecting structure (H2).

12. The damper of claim 1, wherein Further comprising a spring (4), the top end of the spring (4) is connected with the bottom end of the support shaft (221), and the bottom end of the spring (4) is connected with the bottom surface of the first cavity (C1).

13. The damper of claim 12, wherein The stiffness of the spring (4) is variable.

14. The damper of claim 13, wherein From the axial top end of the spring (4) to the axial bottom end of the spring (4), the diameter of the spring (4) first decreases and then increases.

15. The damper of any one of claims 1 to 7, wherein, The inside of the core (2) is provided with a third cavity (C3), and the third cavity (C3) is filled with damping particles (P).

16. The damper of any one of claims 1 to 7, wherein, Further comprising a coil (3) arranged on the circumferential outside of the outer cylinder (1), the damping liquid (L) is a magnetorheological liquid, and the damper (S) is configured to adjust the viscosity of the magnetorheological liquid according to the current intensity of the coil (3).

17. A vibration damping system, characterized by Comprising: The damper (S) according to claim 16; A vibration detection device (6) configured to obtain the vibration load of a vibration isolation object (O) of a vibration isolation system; And A control device (5) in signal connection with the vibration detection device (6) and the coil (3), configured to output a control signal for adjusting the current intensity of the coil (3) according to the vibration load.

18. A vehicle characterized by comprising: Comprising the damper according to any one of claims 1 to 16, or, comprising the vibration isolation system of claim 17.

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